The rework of the host tools discovery caused automake to embed
absolute paths to staging_dir/host/bin/perl into the shebang
of the generated automake executables.

Switch to the portable "/usr/bin/env perl" and enable global
warnings through "$^W" instead of the "-w" interpreter argument.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 44972

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 43895

Signed-off-by: Luka Perkov <luka@openwrt.org>

SVN-Revision: 39108

Signed-off-by: Luka Perkov <openwrt@lukaperkov.net>

SVN-Revision: 31173

SVN-Revision: 29828

automake: rework patch; only skip when the directories does not exist, this preserves error cases like missing access permissions

SVN-Revision: 24427

SVN-Revision: 24424