fixup! Makefile: Set htmldir to match the default HTML docs location under MSYS

We are not supporting msysGit anymore, as there are no known users left
(the last known user was Johannes "Hannes" Sixt).

This patch has no effect when building outside msysGit. So let's drop
it from Git for Windows' branch thicket.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

config.mak.uname

@@ -622,7 +622,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	NATIVE_CRLF = YesPlease
 	X = .exe
 ifneq (,$(wildcard ../THIS_IS_MSYSGIT))
-	htmldir = share/doc/git/$(firstword $(subst -, ,$(GIT_VERSION)))/html
+	htmldir = doc/git/html/
 	prefix =
 	INSTALL = /bin/install
 	EXTLIBS += /mingw/lib/libz.a