CMakeLists.txt: Address Sanitizer Support

1. add sanitize flag to link flags
  2. use ${ADDRESS_SANITIZER} as a condition to turn on/off
     instead of (DEFINED ADDRESS_SANITIZER).
     The latter will always turn the feature on regardless of
     the value as long as there is "-DADDRESS_SANITIZER in
     cmake command line,which will be an issue when merging to
     the mainline
Amended: put -fsanitize=address at the begining in link flags

Change-Id: I84df0e5b6d7fb8f02f18bf7961f25f15cac10443
Signed-off-by: Gefei Jiang <gefei.jiang@amd.com>


[ROCm/ROCR-Runtime commit: d3bc75d229]

projects/rocr-runtime/CMakeLists.txt

@@ -90,19 +90,21 @@ else ()
     set ( HSAKMT_C_FLAGS "${HSAKMT_C_FLAGS}" -g )
 endif ()
 
-## Address Sanitize Flag
-if (DEFINED ADDRESS_SANITIZER)
-    set ( HSAKMT_C_FLAGS "${HSAKMT_C_FLAGS}" -fsanitize=address )
-    # for debugging
-    # toDo: remove this line when merging to mainline
-    message( STATUS "ADDRESS_SANITIZE: HSAKMT_C_FLAGS=: ${HSAKMT_C_FLAGS}" )
-endif ()
-
 set ( HSAKMT_LINKER_SCRIPT "${CMAKE_CURRENT_SOURCE_DIR}/src/libhsakmt.ver" )
 
+## Address Sanitize Flag
+if ( ${ADDRESS_SANITIZER} )
+    set ( HSAKMT_C_FLAGS "${HSAKMT_C_FLAGS}" -fsanitize=address )
+    message( STATUS "ADDRESS_SANITIZE: HSAKMT_C_FLAGS=: ${HSAKMT_C_FLAGS}" )
+    set ( HSAKMT_LINK_FLAGS "-fsanitize=address" )
+endif ()
+
 ## Linker Flags
 ## Add --enable-new-dtags to generate DT_RUNPATH
-set (HSAKMT_LINK_FLAGS "-Wl,--enable-new-dtags -Wl,--version-script=${HSAKMT_LINKER_SCRIPT} -Wl,-soname=${HSAKMT_COMPONENT}.so.${LIB_VERSION_MAJOR} -Wl,-z,nodelete -Wl,-no-undefined" )
+set (HSAKMT_LINK_FLAGS "${HSAKMT_LINK_FLAGS} -Wl,--enable-new-dtags -Wl,--version-script=${HSAKMT_LINKER_SCRIPT} -Wl,-soname=${HSAKMT_COMPONENT}.so.${LIB_VERSION_MAJOR} -Wl,-z,nodelete -Wl,-no-undefined" )
+
+# for debug
+message( STATUS "ADDRESS_SANITIZE: HSAKMT_LINK_FLAGS=: ${HSAKMT_LINK_FLAGS}" )
 
 ## Source files
 set ( HSAKMT_SRC "src/debug.c"