add original PATH to PATH during unit tests

we need this for our opencl tests to be able to execute the opencl compiler during the test

Change-Id: I9f9e8f3ceb26ff62789d888e6eb9f4f94010bb1f
Signed-off-by: I-Jui (Ray) Sung <ray@multicorewareinc.com>

solenv/gbuild/platform/com_MSC_defs.mk

@@ -294,6 +294,6 @@ gb_LTOFLAGS := $(if $(filter TRUE,$(ENABLE_LTO)),-GL)
 # Helper class
 
 # need windows path with backslashes here
-gb_Helper_set_ld_path := PATH="$(shell cygpath -w $(INSTDIR)/$(LIBO_URE_LIB_FOLDER));$(shell cygpath -w $(INSTDIR)/$(LIBO_BIN_FOLDER))"
+gb_Helper_set_ld_path := PATH="$(PATH);$(shell cygpath -w $(INSTDIR)/$(LIBO_URE_LIB_FOLDER));$(shell cygpath -w $(INSTDIR)/$(LIBO_BIN_FOLDER))"
 
 # vim: set noet sw=4: