[PATCH]: Bugfix for grep not working Solaris

[Roland Krause]

On Solaris and some other broken Unixes grep does not accept -e as an
option. The attached patch fixes this problem by calling egrep instead
of grep. 

Please someone test that this will work on Linux and FreeBSD.

Additionally I noticed that some newer versions of libtool or the new
automake generates dependency files with the ending .Po instead of .P. 

This is relevant for the ctags generation and the patch takes care of
that problem too. 

Regards,
Roland

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