fix -pthread in qt5-base instead

qt5-base/riscv64.patch

@@ -1,6 +1,6 @@
 Index: PKGBUILD
 ===================================================================
---- PKGBUILD	(revision 422469)
+--- PKGBUILD	(revision 424590)
 +++ PKGBUILD	(working copy)
 @@ -13,7 +13,7 @@
  depends=('libjpeg-turbo' 'xcb-util-keysyms' 'xcb-util-renderutil' 'libgl' 'fontconfig' 'xdg-utils'
@@ -11,7 +11,16 @@ Index: PKGBUILD
               'gtk3' 'libpulse' 'cups' 'freetds' 'vulkan-headers' 'git')
  optdepends=('qt5-svg: to use SVG icon themes'
              'qt5-wayland: to run Qt applications in a Wayland session'
-@@ -63,7 +63,7 @@
+@@ -47,6 +47,8 @@
+
+   patch -p1 < ../qt5-base-cflags.patch # Use system CFLAGS in qmake
+   patch -p1 < ../qt5-base-nostrip.patch # Don't strip binaries with qmake
++
++  sed -i 's/-lpthread/-pthread/' mkspecs/common/linux.conf src/corelib/configure.json
+ }
+
+ build() {
+@@ -60,7 +62,7 @@
      -datadir /usr/share/qt \
      -sysconfdir /etc/xdg \
      -examplesdir /usr/share/doc/qt/examples \
@@ -20,7 +29,7 @@ Index: PKGBUILD
      -system-sqlite \
      -openssl-linked \
      -nomake examples \
-@@ -73,7 +73,6 @@
+@@ -70,7 +72,6 @@
      -journald \
      -no-mimetype-database \
      -no-use-gold-linker \