libowfat: fix include path
libowfat: fix include path

When this formula was originally introduced (170a230e80794431e4419c88f8e09976f57ee5bd)
we overrode $(INCLUDEDIR) so that it would include into
.../include/libowfat/*.h  However in 2017 the upstream package changed
to do this itself https://github.com/mistydemeo/libowfat/commit/a2f86a77b59daf29e0589bb35b753909342f265a

The result was that recently the headers ended up being installed into
<libowfat/libowfat/*.h> breaking the build of packages that relied
on the original behavior (internal to homebrew this is just the ncp
formula)

Closes #71156.

Signed-off-by: Alexander Bayandin <673dbf9b1367181cd47bae83bf10b2ffe51be6ac@gmail.com>
Signed-off-by: BrewTestBot <8a898ee6867e4f2028e63d2a6319b2224641c06c@users.noreply.github.com>

stgraber/homebrew-core,sjackman/homebrew-core,mfikes/homebrew-core,lemzwerg/homebrew-core,cblecker/homebrew-core,zyedidia/homebrew-core,filcab/homebrew-core,adam-moss/homebrew-core,Homebrew/homebrew-core,JCount/homebrew-core,nbari/homebrew-core,zyedidia/homebrew-core,dsXLII/homebrew-core,dsXLII/homebrew-core,Moisan/homebrew-core,chrisfinazzo/homebrew-core,nbari/homebrew-core,spaam/homebrew-core,filcab/homebrew-core,makigumo/homebrew-core,nandub/homebrew-core,mbcoguno/homebrew-core,Moisan/homebrew-core,cblecker/homebrew-core,mfikes/homebrew-core,Linuxbrew/homebrew-core,lemzwerg/homebrew-core,JCount/homebrew-core,chrisfinazzo/homebrew-core,Linuxbrew/homebrew-core,uyjulian/homebrew-core,Homebrew/homebrew-core,nandub/homebrew-core,mbcoguno/homebrew-core,adam-moss/homebrew-core,sjackman/homebrew-core,spaam/homebrew-core,stgraber/homebrew-core,makigumo/homebrew-core,uyjulian/homebrew-core,mbcoguno/homebrew-core