Fix common typo in comments, warning and error messages.

s/can not/cannot/g

Change-Id: I1bac31157732666deb46f6f20389ff539977ffb9
diff --git a/core/shared_library.mk b/core/shared_library.mk
index 122cd29..97442f7 100644
--- a/core/shared_library.mk
+++ b/core/shared_library.mk
@@ -17,7 +17,7 @@
 $(error $(LOCAL_PATH): Illegal use of OVERRIDE_BUILT_MODULE_PATH)
 endif
 ifneq ($(strip $(LOCAL_MODULE_STEM)$(LOCAL_BUILT_MODULE_STEM)),)
-$(error $(LOCAL_PATH): Can not set module stem for a library)
+$(error $(LOCAL_PATH): Cannot set module stem for a library)
 endif
 
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