Fix libsrtp openssl build

which broke since libsrtp included openssl/srtp.h instead of
its own srtp.h due to the order of include directories

BUG=webrtc:42234521

Change-Id: Idc5cba2114febd1e0835d201b6c23424a88e62d1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/360705
Reviewed-by: Florent Castelli <orphis@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Philipp Hancke <phancke@meta.com>
Cr-Commit-Position: refs/heads/main@{#42913}

pc/BUILD.gn

diff --git a/pc/BUILD.gn b/pc/BUILD.gn
index f16e2c1..2d43148 100644
--- a/pc/BUILD.gn
+++ b/pc/BUILD.gn
@@ -182,10 +182,6 @@
   ]
   if (rtc_build_libsrtp) {
     deps += [ "//third_party/libsrtp" ]
-    configs = []
-    if (!rtc_build_ssl) {
-      configs += [ "..:external_ssl_library" ]
-    }
   }
 }
 
@@ -615,10 +611,6 @@
   ]
   if (rtc_build_libsrtp) {
     deps += [ "//third_party/libsrtp" ]
-    configs = []
-    if (!rtc_build_ssl) {
-      configs += [ "..:external_ssl_library" ]
-    }
   }
 }
 rtc_source_set("srtp_transport") {