[committed] Generate debug line info for thunks on hppa

[John David Anglin]

Previously, pa_asm_output_mi_thunk() internally output the assembler  
directives needed
for thunks.  This patch switches to using final_start_function() an  
final_end_function() to
generate these directives.  This has the advantage that these  
functions also ouput debug
info as well.  This fixes PR debug/55794.

Tested on hppa2.0w-hp-hpux11.11, hppa64-hp-hpux11.11 and hppa-unknown- 
linux-gnu.

Committed to trunk.

Dave
--
John David Anglin	dave.anglin@bell.net


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