patch pings

[Tom Tromey]

Hi!  I have a few unreviewed patches.

[RFA 0/4] Add "pending" attribute to gdb.Breakpoint
https://sourceware.org/ml/gdb-patches/2016-05/msg00343.html

[RFA] PR python/15620, PR python/18620 - breakpoint events in Python
https://sourceware.org/ml/gdb-patches/2016-05/msg00368.html

[RFA] PR python/13598 - add before_prompt event
https://sourceware.org/ml/gdb-patches/2016-05/msg00370.html

[RFA] Fix PR python/20129 - use of non-existing variable
https://sourceware.org/ml/gdb-patches/2016-06/msg00102.html

[RFA 0/6] Add -Wunused-but-set-parameter and -Wunused-but-set-variable
https://sourceware.org/ml/gdb-patches/2016-06/msg00121.html

[RFA] Fix PR cli/18053
https://sourceware.org/ml/gdb-patches/2016-06/msg00125.html

[RFA] PR gdb/17210 - fix possible memory leak in read_memory_robust
https://sourceware.org/ml/gdb-patches/2016-06/msg00184.html

[RFA] PR python/20190 - compute TLS symbol without a frame
https://sourceware.org/ml/gdb-patches/2016-06/msg00070.html

Tom