K 10
svn:author
V 5
tobik
K 8
svn:date
V 27
2019-11-29T22:12:35.898283Z
K 7
svn:log
V 594
lang/rust, Mk/Uses/cargo.mk: Drop gmake build dependency for backtrace-sys

The backtrace-sys crate no longer needs gmake since 0.1.20.
sysutils/flowgger still uses backtrace-sys-0.1.14.  Since it is the
only USES=cargo port left that needs it, move the gmake dependency
directly to it instead.

lang/rust currently has backtrace-sys-0.1.30.  It also vendors
jemalloc-sys (which also needs gmake to build) but it is hidden
behind rustc's jemalloc feature which we do not currently activate.
It should be safe to remove gmake in lang/rust too.

PR:		242267
Reported by:	mikael.urankar@gmail.com

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