clang-format: Remove empty lines at the beginning of blocks.

They very rarely aid readability.

Formatting:
  void f() {

    if (a) {

      f();

    }

  }

Now leads to:
  void f() {
    if (a) {
      f();
    }
  }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204460 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Don't remove empty lines at the start of namespaces.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204462 91177308-0d34-0410-b5e6-96231b3b80d8
[CMake] Propagate top-level targets for compiler-rt runtimes and test-suites
from (external) compiler-rt build tree into LLVM/Clang build tree in
LLVM_BUILD_EXTERNAL_COMPILER_RT mode.

For instance, running
  make asan -j12
in LLVM/Clang build tree will now build Clang, use it to configure
compiler-rt build tree, and invoke "make asan -j12" there. ASan runtime will
be built in the proper location, where Clang driver expects to find it.

Running
  make check-asan
will build Clang, use it to configure compiler-rt build tree, build everything
there, and then run "make check-asan" in compiler-rt build tree using just-built
Clang and ASan runtime.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204463 91177308-0d34-0410-b5e6-96231b3b80d8
Simplify test/CodeGenCXX/microsoft-abi-vtables-multiple-nonvirtual-inheritance.cpp by forcing VFTableBuilder invocation with virtual function calls

Previously the vftables were built at the end of the TU in a reverse-to-random order

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204464 91177308-0d34-0410-b5e6-96231b3b80d8
Simplify test/CodeGenCXX/microsoft-abi-vtables-virtual-inheritance-vtordisps.cpp by forcing VFTableBuilder invocation with virtual function calls

Previously the vftables were built at the end of the TU in a reverse-to-random order

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204465 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Add flag for removing empty lines at the start of blocks.

This unbreaks polly-formatting-tests and we can make a decision for
LLVM style independently.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204467 91177308-0d34-0410-b5e6-96231b3b80d8