appveyor: use VS 2017 image for the autotools builds

The newer images don't have all required MSYS2 packages.

Fixes https://github.com/curl/curl/issues/8248
Closes https://github.com/curl/curl/pull/8265

diff --git a/appveyor.yml b/appveyor.yml
index ccd24ffa6cab9cb10db8aae396333b0b96e14b84..5147d03a2f8965cdc3a07a10fa0898b07fd76c1b 100644 (file)
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -228,17 +228,17 @@ environment:
         TESTING: OFF
         VC_VERSION: VC15
       # autotools-based builds (NOT mingw cross-compiling, but msys2 native)
-      - APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2015"
+      - APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2017"
         BUILD_SYSTEM: autotools
         TESTING: ON
         DISABLED_TESTS: "!19 ~1056 !1233"
         CONFIG_ARGS: "--enable-debug --enable-werror --disable-threaded-resolver --disable-proxy --with-schannel"
-      - APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2019"
+      - APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2017"
         BUILD_SYSTEM: autotools
         TESTING: ON
         DISABLED_TESTS: "!19 !504 !704 !705 ~1056 !1233"
         CONFIG_ARGS: "--enable-debug --enable-werror --disable-threaded-resolver --with-schannel"
-      - APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2019"
+      - APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2017"
         BUILD_SYSTEM: autotools
         TESTING: ON
         DISABLED_TESTS: "!19 !504 !704 !705 ~1056 !1233"