SWDEV-273235 - Fix HIP PCH build

hip_rtc.cpp refers to the symbol __hipGetPCH(), but that one can only be
found in hip_global.cpp. It's not referenced anywhere else, hence it
should be moved.

Change-Id: Ifc67b2f3b1b8344dec0e6c30d083d62288fb5e24


[ROCm/hip commit: 6debae4a14]

projects/hip/rocclr/hip_rtc.cpp

@@ -23,6 +23,15 @@
 #include <hip/hiprtc.h>
 #include "platform/program.hpp"
 
+#ifdef __HIP_ENABLE_PCH
+extern const char __hip_pch[];
+extern unsigned __hip_pch_size;
+void __hipGetPCH(const char** pch, unsigned int *size) {
+  *pch = __hip_pch;
+  *size = __hip_pch_size;
+}
+#endif
+
 namespace hiprtc {
 thread_local hiprtcResult g_lastRtcError = HIPRTC_SUCCESS;
 }