Fix common typo in comments, warning and error messages.

s/can not/cannot/g

Change-Id: I1bac31157732666deb46f6f20389ff539977ffb9
diff --git a/core/host_shared_library.mk b/core/host_shared_library.mk
index 976a942..65e8258 100644
--- a/core/host_shared_library.mk
+++ b/core/host_shared_library.mk
@@ -19,7 +19,7 @@
 $(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
 
 # Put the built modules of all shared libraries in a common directory