liblog4c-localtime: fix build issue on uClibc with --enable-debug

When --enable-debug is used, liblog4c-localtime wants to use
<mcheck.h> if __GLIBC__ is defined. Unfortunately, uClibc defines
__GLIBC__ but does not provides mcheck.h. Therefore, this commit
introduces a patch (0003) that checks if mcheck.h is available or not.

However, this patch requires autoreconfiguring the package, which is
currently broken. Therefore, the two other patches (0004 and 0005) are
meant to fix autoreconfiguration of the package.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>