List icu, add compat upgrade helper

This is intended to avoid the usual breakage in ELN when icu gets a major
version bump.

Author: yselkowitz

configs/sst_display_i18n-icu-compat.yaml

@@ -0,0 +1,24 @@
+document: feedback-pipeline-workload
+version: 1
+data:
+  name: libicu-compat
+  description: ICU (API compatibility)
+  maintainer: sst_display_i18n
+  packages:
+    # Each ICU major version is incompatible with the previous.  When icu 
+    # is bumped, a libicuNN compat package is created, but dependent packages
+    # are not immediately rebuilt.  The new icu build gets triggered in ELN,
+    # but CR doesn't know to trigger a build of the compat package, and
+    # everything breaks as a result.
+    #
+    # Generally, this resolves to libicu already listed above, but this 
+    # should assure that the next compat package gets rebuilt immediately. 
+    # Once the compat has been rebuilt for ELN and is listed by CR, this 
+    # should be updated to the new major version in libicu.  At that point, 
+    # CR will continue to handle it normally until all dependents have been 
+    # updated for the new libicu version, at which point the compat package 
+    # will drop out of ELN.
+    - 'libicudata.so.76()(64bit)'
+  labels:
+    - eln
+    # cNs stays on a single ICU version once branched

configs/sst_display_i18n-icu.yaml

@@ -0,0 +1,13 @@
+document: feedback-pipeline-workload
+version: 1
+data:
+  name: ICU
+  description: International Components for Unicode
+  maintainer: sst_display_i18n
+  packages:
+    - icu
+    - libicu
+    - libicu-devel
+  labels:
+    - eln
+    - c10s