RFR: 8289735: UTIL_LOOKUP_PROGS fails on pathes with space [v2]

[Christoph Langer]

> This is an attempt to fix the issue on Windows when no cygwin Git is installed or the Git for Windows installation has precedence in PATH lookup. The path to the Windows GIT installation usually resides in `C:\Program Files` which contains a space and thus needs some special handling.
> 
> There exists code in `UTIL_LOOKUP_PROGS`/`UTIL_FIXUP_EXECUTABLE` that would handle this. However, it relies on initializations made in `PLATFORM_SETUP_OPENJDK_BUILD_AND_TARGET` and `BASIC_SETUP_PATHS`. Currently, `UTIL_LOOKUP_PROGS(GIT, git)` is called too early in configure and hence the problematic Windows path is not handled correctly. My fix makes sure that only the barely necessary tool lookups required for `PLATFORM_SETUP_OPENJDK_BUILD_AND_TARGET` and `BASIC_SETUP_PATHS` are made in `BASIC_SETUP_FUNDAMENTAL_TOOLS` and everything else is moved into another macro called `BASIC_SETUP_TOOLS` that is invoked after path handling is set up correctly, which includes the lookup of git.

Christoph Langer has updated the pull request incrementally with one additional commit since the last revision:

  Adjust comments

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/13629/files
  - new: https://git.openjdk.org/jdk/pull/13629/files/e4890a96..0f875899

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13629&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13629&range=00-01

  Stats: 5 lines in 3 files changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/13629.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13629/head:pull/13629

PR: https://git.openjdk.org/jdk/pull/13629