Release: Fix possbile issue on some systems with OpenOCD PDF files

Some systems have buggy texinfo that uses a regex that is not valid for
non-C locales.  Solution is to set locale to C before PDF document.

Signed-off-by: Anton Kolesov <[email protected]>

Author: anthony-kolesov

release.mk

@@ -777,7 +777,7 @@ $(OOCD_BUILD_DIR_LINUX)/Makefile:
 
 # Build OpenOCD
 define OOCD_BUILD_CMD
-	$(MAKE) -C $(OOCD_BUILD_DIR_$1) all pdf
+	$(MAKE) -C $(OOCD_BUILD_DIR_$1) all pdf LC_ALL=C
 endef
 
 $(OOCD_BUILD_DIR_LINUX)/src/openocd: $(OOCD_BUILD_DIR_LINUX)/Makefile