egencache issue with dev-util/SPIRV-Tools-1.1_p1

[ghost]

egencache doesn't like the get_version_component_range command:

# egencache --repo=gentoo-gpu --update
 * ERROR: dev-util/SPIRV-Tools-1.1_p1::gentoo-gpu failed (depend phase):
 *   External commands disallowed while sourcing ebuild: get_version_component_range 1-2
 * 
 * Call stack:
 *                   ebuild.sh, line 635:  Called source '/var/lib/layman/gentoo-gpu/dev-util/SPIRV-Tools/SPIRV-Tools-1.1_p1.ebuild'
 *   SPIRV-Tools-1.1_p1.ebuild, line  18:  Called command_not_found_handle 'get_version_component_range' '1-2'
 *                   ebuild.sh, line  88:  Called die
 * The specific snippet of code:
 *   		die "External commands disallowed while sourcing ebuild: ${*}"
 * 
 * If you need support, post the output of `emerge --info '=dev-util/SPIRV-Tools-1.1_p1::gentoo-gpu'`,
 * the complete build log and the output of `emerge -pqv '=dev-util/SPIRV-Tools-1.1_p1::gentoo-gpu'`.
 * Working directory: '/usr/lib64/python2.7/site-packages'
 * S: '/var/tmp/portage/dev-util/SPIRV-Tools-1.1_p1/work/SPIRV-Tools-1.1_p1'

[sjnewbury]

@atomsymbol I have updated/fixed this in my local overlay. I'll get it pushed.