Enable C++ exceptions on MSVC when building C++ tests

Author: Amanieu

src/test/run-make-fulldeps/tools.mk

@@ -60,7 +60,7 @@ endif
 
 ifdef IS_MSVC
 COMPILE_OBJ = $(CC) -c -Fo:`cygpath -w $(1)` $(2)
-COMPILE_OBJ_CXX = $(CXX) -c -Fo:`cygpath -w $(1)` $(2)
+COMPILE_OBJ_CXX = $(CXX) -EHs -c -Fo:`cygpath -w $(1)` $(2)
 NATIVE_STATICLIB_FILE = $(1).lib
 NATIVE_STATICLIB = $(TMPDIR)/$(call NATIVE_STATICLIB_FILE,$(1))
 OUT_EXE=-Fe:`cygpath -w $(TMPDIR)/$(call BIN,$(1))` \