libgomp HSA/GCN plugins: don't prepend the 'HSA_RUNTIME_LIB' path to 'libhsa-runtime64.so'

For unknown reasons, this had gotten added for the libgomp HSA plugin in commit
b8d89b03db (r242749) "Remove build dependence on
HSA run-time", and later propagated into the GCN plugin.

	libgomp/
	* plugin/plugin-gcn.c (init_environment_variables): Don't prepend
	the 'HSA_RUNTIME_LIB' path to 'libhsa-runtime64.so'.
	* plugin/configfrag.ac (HSA_RUNTIME_LIB): Clean up.
	* config.h.in: Regenerate.
	* configure: Likewise.

libgomp/config.h.in

@@ -130,9 +130,6 @@
 /* Define to 1 if you have the `__secure_getenv' function. */
 #undef HAVE___SECURE_GETENV
 
-/* Define path to HSA runtime. */
-#undef HSA_RUNTIME_LIB
-
 /* Define to 1 if GNU symbol versioning is used for libgomp. */
 #undef LIBGOMP_GNU_SYMBOL_VERSIONING
 

libgomp/configure

@@ -15448,16 +15448,6 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
-if test "$HSA_RUNTIME_LIB" != ""; then
-  HSA_RUNTIME_LIB="$HSA_RUNTIME_LIB/"
-fi
-
-
-cat >>confdefs.h <<_ACEOF
-#define HSA_RUNTIME_LIB "$HSA_RUNTIME_LIB"
-_ACEOF
-
-
 
 # Check for functions needed.
 for ac_func in getloadavg clock_gettime strtoull

libgomp/plugin/configfrag.ac

@@ -272,10 +272,3 @@ AC_DEFINE_UNQUOTED([PLUGIN_NVPTX_DYNAMIC], [$PLUGIN_NVPTX_DYNAMIC],
 AM_CONDITIONAL([PLUGIN_GCN], [test $PLUGIN_GCN = 1])
 AC_DEFINE_UNQUOTED([PLUGIN_GCN], [$PLUGIN_GCN],
   [Define to 1 if the GCN plugin is built, 0 if not.])
-
-if test "$HSA_RUNTIME_LIB" != ""; then
-  HSA_RUNTIME_LIB="$HSA_RUNTIME_LIB/"
-fi
-
-AC_DEFINE_UNQUOTED([HSA_RUNTIME_LIB], ["$HSA_RUNTIME_LIB"],
-  [Define path to HSA runtime.])

libgomp/plugin/plugin-gcn.c

@@ -1072,7 +1072,7 @@ init_environment_variables (void)
 
   hsa_runtime_lib = secure_getenv ("HSA_RUNTIME_LIB");
   if (hsa_runtime_lib == NULL)
-    hsa_runtime_lib = HSA_RUNTIME_LIB "libhsa-runtime64.so.1";
+    hsa_runtime_lib = "libhsa-runtime64.so.1";
 
   support_cpu_devices = secure_getenv ("GCN_SUPPORT_CPU_DEVICES");