makefiles: Generate proper dependency files when using ccache#12840

Merged

cgundogan merged 2 commits intoRIOT-OS:masterfrom leandrolanzieri:pr/makefiles_remove_ccache_basedir

Dec 2, 2019

Commits on Nov 28, 2019

makefiles: Do not set CCACHE_BASEDIR environmental variable
leandrolanzieri
committed

Commits on Nov 29, 2019

Makefile.base: Set targets of *.d files to absolute object path
leandrolanzieri
committed