main/cgdb: fix in-program help

The APKBUILD installs the help file (cgdb.txt) to an unusual location,
making cgdb unable to find it. Add a one-line patch to fix that.

main/cgdb/APKBUILD

@@ -2,14 +2,15 @@
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=cgdb
 pkgver=0.8.0
-pkgrel=3
+pkgrel=4
 pkgdesc="The Curses Debugger"
 arch="all"
 license="GPL-2.0-or-later"
 url="https://cgdb.github.io/"
 depends="gdb"
 makedepends="flex bison texinfo help2man ncurses-dev readline-dev"
-source="http://cgdb.me/files/cgdb-$pkgver.tar.gz"
+source="http://cgdb.me/files/cgdb-$pkgver.tar.gz
+	doc-path.patch"
 subpackages="$pkgname-doc"
 
 prepare() {
@@ -42,4 +43,5 @@ package() {
 
 sha512sums="
 0f53798707f20508a8ea564d5ed3f82e223edf4b246468c9a99c929c043b2b2eb333e96395b66672a38da1e517efb7c7dec011a29ea774d873ddf81fb56e4d9a  cgdb-0.8.0.tar.gz
+89bb741d7b8f0570c566af91c747abba35289b2b77abe6453a8aea0aa7c24b97dc0ace669d776abe35cdcf88856f046595685538c6d68abb1f2beca4e6692ac6  doc-path.patch
 "

main/cgdb/doc-path.patch

+Alpine-specific patch; Look for cgdb.txt where it's packaged.
+
+--- a/cgdb/interface.cpp
++++ b/cgdb/interface.cpp
+@@ -1566,7 +1566,7 @@
+     char cgdb_help_file[FSUTIL_PATH_MAX];
+     int ret_val = 0;
+ 
+-    fs_util_get_path(PKGDATADIR, "cgdb.txt", cgdb_help_file);
++    fs_util_get_path("/usr/share/doc/cgdb", "cgdb.txt", cgdb_help_file);
+ 
+     /* File doesn't exist. Try to find cgdb.txt in the build dir in case
+      * the user is running a built cgdb binary directly. */