It has to copy all the files into the same directory, stripping the
relative path from the source file.
Bug: 193540681
Test: rbcrun build/make/tests/run.rbc
Change-Id: I2d61d966ad94d73131c7ad6016ce319f8d2ae509
The macro find-and-copy finds all the files in the given source tree that
match the given filename patten and create <source>:<dest> pair with the
same relative path in the destination tree.
Bug: 193540681
Test: rbcrun build/make/tests/run.rbc
Change-Id: Ic4315ce2fab7a7791ab55dd9eed039205a1c721a