build: remove `MAKE_BUILD_STRINGS` function
This function causes the build message to be generated and compiled in
two different ways, with one way done inside `build_macros.mk` and the
other done inside `windows.mk`, mostly because it's done by generating
the C file on the command line.
We can instead replace this whole build message generation sequence with
a simple standard C compilation command and a normal C file.
Change-Id: I8bc136380c9585ddeec9a11154ee39ef70526f81
Signed-off-by: Chris Kay <chris.kay@arm.com>
17 files changed