bootstrap: remove -I ./thirdparty/stdatomic/nix from make files (#14111)

.github/workflows/ci.yml

@@ -429,7 +429,7 @@ jobs:
       - name: Test new v.c
         run: |
           .\v.exe -o v.c cmd/v
-          gcc -Werror -I ./thirdparty/stdatomic/win -municode -w v.c
+          gcc -Werror -municode -w v.c
       - name: Install dependencies
         run: |
           .\v.exe setup-freetype
@@ -534,7 +534,7 @@ jobs:
       - name: Test new v.c
         run: |
           .\v.exe -o v.c cmd/v
-          .\thirdparty\tcc\tcc.exe -I ./thirdparty/stdatomic/win -Werror -w -ladvapi32 -bt10 v.c
+          .\thirdparty\tcc\tcc.exe -Werror -w -ladvapi32 -bt10 v.c
       - name: Install dependencies
         run: |
           .\v.exe setup-freetype
@@ -575,7 +575,7 @@ jobs:
         ##          .\v.exe wipe-cache
         ##          .\make.bat -tcc32
         ##      - name: Test new v.c
-        ##        run: .\v.exe -o v.c cmd/v && .\thirdparty\tcc\tcc.exe -I ./thirdparty/stdatomic/win -Werror -g -w -ladvapi32 -bt10 v.c
+        ##        run: .\v.exe -o v.c cmd/v && .\thirdparty\tcc\tcc.exe -Werror -g -w -ladvapi32 -bt10 v.c
         ##      - name: v doctor
         ##        run: ./v doctor
         ##

.github/workflows/ci_bootstrapping_works.yml

@@ -14,7 +14,7 @@ jobs:
     timeout-minutes: 30
     env:
       VFLAGS: -cc tcc -no-retry-compilation
-      B_CFLAGS: -g -std=gnu11 -I ./thirdparty/stdatomic/nix -w
+      B_CFLAGS: -g -std=gnu11 -w
       B_LFLAGS: -lm -lpthread
     steps:
       - uses: actions/checkout@v2
@@ -52,7 +52,7 @@ jobs:
     timeout-minutes: 30
     env:
       VFLAGS: -cc clang
-      B_CFLAGS: -g -std=gnu11 -I ./thirdparty/stdatomic/nix -w
+      B_CFLAGS: -g -std=gnu11 -w
       B_LFLAGS: -lm -lpthread
     steps:
       - uses: actions/checkout@v2

.github/workflows/ci_cross.yml

@@ -71,14 +71,14 @@ jobs:
       - name: v.c can be compiled and run with -os cross
         run: |
           ./v -os cross -o /tmp/v.c cmd/v
-          gcc  -g -std=gnu11 -I ./thirdparty/stdatomic/nix -w -o v_from_vc /tmp/v.c  -lm -lpthread
+          gcc  -g -std=gnu11 -w -o v_from_vc /tmp/v.c  -lm -lpthread
           ls -lart v_from_vc
           ./v_from_vc version
 
       - name: v_win.c can be compiled and run with -os windows
         run: |
           ./v -cc msvc -os windows -o /tmp/v_win.c cmd/v
-          x86_64-w64-mingw32-gcc -I ./thirdparty/stdatomic/win /tmp/v_win.c -std=c99 -w -municode -o v_from_vc.exe
+          x86_64-w64-mingw32-gcc /tmp/v_win.c -std=c99 -w -municode -o v_from_vc.exe
           ls -lart v_from_vc.exe
           wine64 ./v_from_vc.exe version