Replace -Wno-error-* with -Wno-error=*

Bug: 179064527
Test: make
Change-Id: Id6f6bab971519b8c142791cf9799a5526e04f525
diff --git a/wpa_supplicant/Android.mk b/wpa_supplicant/Android.mk
index 6202416..02f5ca9 100644
--- a/wpa_supplicant/Android.mk
+++ b/wpa_supplicant/Android.mk
@@ -29,7 +29,7 @@
 L_CFLAGS += -Wall -Werror
 
 # Keep sometimes uninitialized warnings
-L_CFLAGS += -Wno-error-sometimes-uninitialized
+L_CFLAGS += -Wno-error=sometimes-uninitialized
 
 # Disable incompatible pointer type warnings
 L_CFLAGS += -Wno-incompatible-pointer-types