[patch][lra] Use XNEWVEC and friends instead of xmalloc/xrealloc, and add some timevars

[Steven Bosscher]

Hello,

This patch uses the libiberty new-like operators instead of using
xmalloc/xrealloc.
It also adds timevars for the main LRA phases, and it fixes a warning
suggesting a space before a ';' in an only-looping for loop.

Bootstrapped (lra-branch, of course) on x86_64-unknown-linux-gnu. OK?

Ciao!
Steven

lra_XALLOC.diff
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