Rename clang link from clang-X.Y to clang-X

Summary:
As we are only doing X.0.Z releases (not using the minor version), there is no need to keep -X.Y in the version.
So, instead, I propose the following:
Instead of having clang-7.0 in bin/, we will have clang-7

Since also matches was gcc is doing.

Reviewers: tstellar, dlj, dim, hans

Reviewed By: dim, hans

Subscribers: dim, mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D41808

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@328769 91177308-0d34-0410-b5e6-96231b3b80d8

CMakeLists.txt

@@ -424,11 +424,11 @@ endif()
 
 # Clang version information
 set(CLANG_EXECUTABLE_VERSION
-     "${CLANG_VERSION_MAJOR}.${CLANG_VERSION_MINOR}" CACHE STRING
-    "Version number that will be placed into the clang executable, in the form XX.YY")
+    "${CLANG_VERSION_MAJOR}" CACHE STRING
+    "Major version number that will be appended to the clang executable name")
 set(LIBCLANG_LIBRARY_VERSION
-     "${CLANG_VERSION_MAJOR}.${CLANG_VERSION_MINOR}" CACHE STRING
-    "Version number that will be placed into the libclang library , in the form XX.YY")
+    "${CLANG_VERSION_MAJOR}" CACHE STRING
+    "Major version number that will be appended to the libclang library")
 mark_as_advanced(CLANG_EXECUTABLE_VERSION LIBCLANG_LIBRARY_VERSION)
 
 option(CLANG_INCLUDE_TESTS

docs/ReleaseNotes.rst

@@ -62,6 +62,9 @@ Improvements to Clang's diagnostics
 Non-comprehensive list of changes in this release
 -------------------------------------------------
 
+- clang binary and libraries have been renamed from 7.0 to 7.
+  For example, the clang binary will be called clang-7 instead of clang-7.0.
+
 - ...
 
 New Compiler Flags