depends: ensure we are appending to sqlite cflags

Otherwise we'll just override other flags passed in (i.e msan).

Author: fanquake

depends/packages/sqlite.mk

@@ -12,7 +12,7 @@ $(package)_config_opts_freebsd=--with-pic
 $(package)_config_opts_netbsd=--with-pic
 $(package)_config_opts_openbsd=--with-pic
 $(package)_config_opts_debug=--enable-debug
-$(package)_cflags=-DSQLITE_DQS=0 -DSQLITE_DEFAULT_MEMSTATUS=0 -DSQLITE_OMIT_DEPRECATED
+$(package)_cflags+=-DSQLITE_DQS=0 -DSQLITE_DEFAULT_MEMSTATUS=0 -DSQLITE_OMIT_DEPRECATED
 $(package)_cflags+=-DSQLITE_OMIT_SHARED_CACHE -DSQLITE_OMIT_JSON -DSQLITE_LIKE_DOESNT_MATCH_BLOBS
 $(package)_cflags+=-DSQLITE_OMIT_DECLTYPE -DSQLITE_OMIT_PROGRESS_CALLBACK -DSQLITE_OMIT_AUTOINIT
 endef