[Patch, Fortran, committed] PR53310 - Fix multi-malloc memory leak in EOSHIFT

[Tobias Burnus]

I have committed the attached patch as obvious. libgfortran (since GCC 
4.5) allocates the memory rank()-times instead of only once in eoshift2. 
For the test case of the PR, gfortran leaked 6 MB per call!

Build and regtested on x86-64-linux and comitted as Rev. 187395 to the 
4.8 trunk. I intent to backport the patch, but I have not yet decided 
whether it will be down to 4.5 or not.

Tobias

PS: In the ChangeLog I have converted some spaces into tabs.
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