Re-instantiate support for old symvers path

As it breaks bz1004930-detect-kabi-provides test[1] otherwise.

[1] http://pkgs.devel.redhat.com/cgit/tests/redhat-rpm-config/tree/Sanity/bz1004930-detect-kabi-provides

- Re-instantiate support for old symvers path

* kabi.attr (%__kabi_path): Add "/boot/symvers-.*" to the path matching
regular expression.
* kabi.sh: Likewise.

Resolves: #1942563
Resolves: #2008554

Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>

kabi.attr

@@ -1,2 +1,2 @@
 %__kabi_provides	%{_rpmconfigdir}/kabi.sh
-%__kabi_path            ^/lib/modules/[1-9].*/symvers.gz$
+%__kabi_path            ^(/boot/symvers-.*|/lib/modules/[1-9].*/symvers)\.gz$

kabi.sh

@@ -7,7 +7,7 @@
 
 IFS=$'\n'
 
-for symvers in $(grep -E '/lib/modules/[1-9].*/symvers\.gz') "$@";
+for symvers in $(grep -E '(/boot/symvers-.*|/lib/modules/[1-9].*/symvers)\.gz') "$@";
 do
     zcat $symvers | awk ' {print "kernel(" $2 ") = " $1 }'
 done