Restructure platform/randlib

* Move mbed-client-randlib/ headers into include/
  (Note: we don't rename it to "randlib" because this library
   is mirrored to https://github.com/ARMmbed/mbed-client-randlib,
   and "mbed-client-randlib" may be reference by some projects)
* Move the standalone local unit test into tests/unit

Author: LDong-Arm

connectivity/cellular/tests/UNITTESTS/framework/AT/at_cellulardevice/unittest.cmake

@@ -9,7 +9,7 @@ set(unittest-includes ${unittest-includes}
   ../connectivity/cellular/include/cellular/framework/common
   ../connectivity/cellular/include/cellular/framework/AT
   ../connectivity/cellular/include/cellular/framework/device
-  ../platform/randlib/mbed-client-randlib
+  ../platform/randlib/include/mbed-client-randlib
   ../drivers
   ../hal
 )

connectivity/cellular/tests/UNITTESTS/framework/AT/at_cellularinformation/unittest.cmake

@@ -8,7 +8,7 @@ set(unittest-includes ${unittest-includes}
   ../connectivity/cellular/tests/UNITTESTS/framework/common/util
   ../connectivity/cellular/include/cellular/framework/common
   ../connectivity/cellular/include/cellular/framework/AT
-  ../platform/randlib/mbed-client-randlib
+  ../platform/randlib/include/mbed-client-randlib
 )
 
 # Source files

connectivity/cellular/tests/UNITTESTS/framework/AT/at_cellularnetwork/unittest.cmake

@@ -8,7 +8,7 @@ set(unittest-includes ${unittest-includes}
   ../connectivity/cellular/tests/UNITTESTS/framework/common/util
   ../connectivity/cellular/include/cellular/framework/common
   ../connectivity/cellular/include/cellular/framework/AT
-  ../platform/randlib/mbed-client-randlib
+  ../platform/randlib/include/mbed-client-randlib
 )
 
 # Source files

connectivity/cellular/tests/UNITTESTS/framework/AT/at_cellularsms/unittest.cmake

@@ -8,7 +8,7 @@ set(unittest-includes ${unittest-includes}
   ../connectivity/cellular/tests/UNITTESTS/framework/common/util
   ../connectivity/cellular/include/cellular/framework/common
   ../connectivity/cellular/include/cellular/framework/AT
-  ../platform/randlib/mbed-client-randlib
+  ../platform/randlib/include/mbed-client-randlib
 )
 
 # Source files

connectivity/cellular/tests/UNITTESTS/framework/AT/at_cellularstack/unittest.cmake

@@ -8,7 +8,7 @@ set(unittest-includes ${unittest-includes}
   ../connectivity/cellular/tests/UNITTESTS/framework/common/util
   ../connectivity/cellular/include/cellular/framework/common
   ../connectivity/cellular/include/cellular/framework/AT
-  ../platform/randlib/mbed-client-randlib
+  ../platform/randlib/include/mbed-client-randlib
 )
 
 # Source files

connectivity/cellular/tests/UNITTESTS/framework/common/util/unittest.cmake

@@ -7,7 +7,7 @@
 set(unittest-includes ${unittest-includes}
   ../connectivity/cellular/tests/UNITTESTS/framework/common/util
   ../connectivity/cellular/include/cellular/framework/common
-  ../platform/randlib/mbed-client-randlib
+  ../platform/randlib/include/mbed-client-randlib
 )
 
 # Source files

connectivity/cellular/tests/UNITTESTS/framework/device/athandler/unittest.cmake

@@ -9,7 +9,7 @@ set(unittest-includes ${unittest-includes}
   ../connectivity/cellular/tests/UNITTESTS/framework/common/util
   ../connectivity/cellular/include/cellular/framework/common
   ../connectivity/cellular/include/cellular/framework/AT
-  ../platform/randlib/mbed-client-randlib
+  ../platform/randlib/include/mbed-client-randlib
 
 )
 

platform/randlib/.mbedignore

@@ -1,2 +1,2 @@
 linux/*
-test/*
+tests/unit/*

platform/randlib/.yotta_ignore

@@ -1 +1 @@
-test/*
+tests/unit/*