Update search tool help.

jira/bin/jira-search.sh
-----------------------
  o Help text growing long, refactor help text into jira-search/help.
  o Added command line switches --help-* and --usage-*

jira/jira-search/help/utils.sh
------------------------------
  o Added library functions for displaying context help.
  o Display switch permutations for a given prefix.
  o Display use cases for a given switch.

jira/jira-search/help/fixversion.switches
jira/jira-search/help/resolved.sh
jira/jira-search/help/resolved.switches
jira/jira-search/help/resolved.usage
jira/jira-search/help/user.switches
jira/jira-search/help/user.usage
-----------------------------------------
  o Switch help and usage text.

Change-Id: I0cd34475521c2b42054fbe4e7966a6d3767f8f89
diff --git a/makefile b/makefile
index 262c76f..1be78b2 100644
--- a/makefile
+++ b/makefile
@@ -2,6 +2,10 @@
 ## -----------------------------------------------------------------------
 ## -----------------------------------------------------------------------
 
+##-------------------##
+##---]  GLOBALS  [---##
+##-------------------##
+GIT       ?= /usr/bin/env git
 common-sh := lf/onf-common/common.sh
 
 all : $(common-sh)
@@ -10,6 +14,6 @@
 ## Intent: On-demand submodule checkout
 ## -----------------------------------------------------------------------
 $(common-sh) :
-	git submodule update --init --recursive
+	$(GIT) submodule update --init --recursive
 
 # [EOF]