Install c-index-test as part of install-clang-c Makefile rule.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140681 91177308-0d34-0410-b5e6-96231b3b80d8

tools/c-index-test/Makefile

@@ -13,9 +13,6 @@ TOOLNAME = c-index-test
 # No plugins, optimize startup time.
 TOOL_NO_EXPORTS = 1
 
-# Don't install this. It is used for tests.
-NO_INSTALL = 1
-
 LINK_COMPONENTS := support mc
 USEDLIBS = clang.a clangIndex.a clangFrontend.a clangDriver.a \
 	   clangSerialization.a clangParse.a clangSema.a \