i#1749,i#1324: generalize mingw_glob suppression
i#1749,i#1324: generalize mingw_glob suppression

Generalizes the __mingw_glob suppression for a deliberate uninitialized
read in MinGW's startup from i#1324 to match what we see in i#1749.

Review-URL: https://codereview.appspot.com/262980044

LohithBlaze/drmemory,code4bones/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,code4bones/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory,code4bones/drmemory,code4bones/drmemory,code4bones/drmemory