Make install-build-deps.sh install libtinfo-dev (64-bit) package

libtinfo is needed to build GDB on the NaCl toolchain builders.  We
previously built only i686-linux versions, but now build x86_64-linux
versions too, so we need the 64-bit version of this library package.

BUG= none
TEST= none
R=bradnelson@google.com

Review URL: https://codereview.chromium.org/309503007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274082 0039d316-1c4b-4281-b951-d872f2087c98

build/install-build-deps.sh

@@ -143,7 +143,7 @@ arm_list="libc6-dev-armhf-cross
           g++-arm-linux-gnueabihf"
 
 # Packages to build standalone NaCl and all its toolchains.
-nacl_list="g++-mingw-w64-i686 libtinfo-dev:i386"
+nacl_list="g++-mingw-w64-i686 libtinfo-dev libtinfo-dev:i386"
 
 # Some package names have changed over time
 if package_exists ttf-mscorefonts-installer; then