Add config file for building with ASAN and without bootstrap.

ChangeLog:

	* .github/disable-bootstrap-asan.mk: New file.

Signed-off-by: Owen Avery <powerboat9.gamer@gmail.com>

.github/disable-bootstrap-asan.mk

@@ -0,0 +1,8 @@
+# This option enables -fsanitize=address for all stages.
+
+# Suppress LeakSanitizer in bootstrap.
+export ASAN_OPTIONS=detect_leaks=0:use_odr_indicator=1
+
+CFLAGS += -fsanitize=address
+CXXFLAGS += -fsanitize=address
+LDFLAGS += -fsanitize=address -static-libasan