Fix warnings in coreboot utilities.

- Fix some poor programming practice (breaks of strict aliasing as well
  as not checking the return value of read)
- Use PRIx64 instead of %llx to prevent compilation warnings with both
  32bit and 64bit compilers
- Use same compiler command options when linking inteltool and when
  detecting libpci for inteltool

Change-Id: I08b2e8d1bbc908f6b1f26d25cb3a4b03d818e124
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/752
Tested-by: build bot (Jenkins)
Reviewed-by: Mathias Krause <minipli@googlemail.com>

util/inteltool/Makefile

@@ -42,7 +42,7 @@ endif
 all: pciutils dep $(PROGRAM)
 
 $(PROGRAM): $(OBJS)
-	$(CC) -o $(PROGRAM) $(OBJS) $(LDFLAGS)
+	$(CC) $(CFLAGS) -o $(PROGRAM) $(OBJS) $(LDFLAGS)
 
 clean:
 	rm -f $(PROGRAM) *.o *~
@@ -59,7 +59,7 @@ pciutils:
 		   printf "struct pci_access *pacc;\n";		\
 		   printf "int main(int argc, char **argv)\n";	\
 		   printf "{ pacc = pci_alloc(); return 0; }\n"; ) > .test.c )
-	@$(CC) $(CFLAGS) $(LDFLAGS) .test.c -o .test &>/dev/null &&	  \
+	@$(CC) $(CFLAGS) .test.c -o .test $(LDFLAGS) &>/dev/null &&	  \
 		printf "found.\n" || ( printf "not found.\n\n"; 	  \
 		printf "Please install pciutils-devel and zlib-devel.\n"; \
 		printf "See README for more information.\n\n";		  \