Fix typo in fprofile-prefix-path.

	Backport from mainline
	2020-05-11  Martin Liska  <mliska@suse.cz>

	PR c/95040
	* common.opt: Fix typo in option description.

gcc/ChangeLog

+2020-05-11  Martin Liska  <mliska@suse.cz>
+
+	Backport from mainline
+	2020-05-11  Martin Liska  <mliska@suse.cz>
+
+	PR c/95040
+	* common.opt: Fix typo in option description.
+
 2020-05-08  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/94724

gcc/common.opt

@@ -2210,7 +2210,7 @@ Enum(profile_update) String(prefer-atomic) Value(PROFILE_UPDATE_PREFER_ATOMIC)
 
 fprofile-prefix-path=
 Common Joined RejectNegative Var(profile_prefix_path)
-Remove prefix from absolute path before manging name for -fprofile-generate= and -fprofile-use=.
+Remove prefix from absolute path before mangling name for -fprofile-generate= and -fprofile-use=.
 
 fprofile-generate
 Common