mrbayes: revision bump for Linux

[iMichka]

Fixes:
Thread 1 "mb" received signal SIGILL, Illegal instruction.
0x00000000004a869b in SetUpMoveTypes ()

(gdb) bt full
#0 0x00000000004a869b in SetUpMoveTypes ()
No symbol table info available.
#1 0x00000000004046cf in InitializeMrBayes ()
No symbol table info available.
#2 0x000000000040376d in main ()
No symbol table info available.

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[iMichka]

I'm unsure how/why this got broken, but the Linux test does not work anymore, and rebuilding the formula from source fixes it.

[BrewTestBot]

🤖 A scheduled task has triggered a merge.