ruby: Fix DEBUG_PREFIX_MAP in LDFLAGS issue

(From OE-Core rev: 78da145c2f2fbd58e286e8ce983c2cc0b074e6a5)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/ruby/ruby_3.0.2.bb

@@ -55,6 +55,10 @@ do_install:append:class-target () {
            -e 's:${RECIPE_SYSROOT}::g' \
            -e 's:${BASE_WORKDIR}/${MULTIMACH_TARGET_SYS}::g' \
         ${D}$rbconfig_rb
+
+    sed -i -e 's|${DEBUG_PREFIX_MAP}||g' \
+        ${D}${libdir}/pkgconfig/*.pc
+
 }
 
 do_install_ptest () {