Filter out __has_include* compiler defines

They are internal to compiler and this header is later on includes in C
files, but newer gcc >= 10 complains about it.

error in initial header file:
| In file included from /tmp/20200124-86625-14hiju4.c:1:
| /tmp/20200124-86625-11y6l6i.h:13849:9: error: "__has_include" cannot be used as a macro name
| 13849 | #define __has_include __has_include
|       |         ^~~~~~~~~~~~~
| compilation terminated due to -Wfatal-errors.

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

--- a/common.mk
+++ b/common.mk
@@ -221,6 +221,8 @@ $(TIMESTAMPDIR)/$(MJIT_HEADER:.h=)$(MJIT
 		$(TIMESTAMPDIR)/$(arch)/.time
 	$(ECHO) building $(@F:.time=.h)
 	$(Q) $(CPP) -DMJIT_HEADER $(MJIT_HEADER_FLAGS) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(srcdir)/vm.c $(CPPOUTFLAG)$(@F:.time=.h).new
+	$(Q)sed -i -e "/#define __has_include __has_include/d" $(@F:.time=.h).new
+	$(Q)sed -i -e "/#define __has_include_next __has_include_next/d" $(@F:.time=.h).new
 	$(Q) $(IFCHANGE) "--timestamp=$@" $(@F:.time=.h) $(@F:.time=.h).new
 
 $(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).h: $(TIMESTAMPDIR)/$(MJIT_HEADER:.h=)$(MJIT_HEADER_SUFFIX).time