ci: Workaround for LTO error

The following error sometimes occurs during the build process:
"error: failed to get bitcode from object file for LTO (could not
find requested section)".
This issue is often observed when building with multiple parallel
jobs. As a temporary workaround, the number of parallel jobs has
been reduced to mitigate the error.

Signed-off-by: Yuan Zhuang <yuanz@apache.org>

Author: DemesneGH

.github/workflows/ci.yml

@@ -117,10 +117,10 @@ jobs:
           source environment
 
           # Build OP-TEE Rust examples for Arm 64-bit both host and TA
-          make -j`nproc`
+          make -j2
 
           # Build project
-          (cd projects/web3/eth_wallet && make -j`nproc`)
+          (cd projects/web3/eth_wallet && make)
       - name: Run tests for Arm 64-bit both host and TA
         run: |
           export STD=y
@@ -151,10 +151,10 @@ jobs:
           source environment
 
           # Build OP-TEE Rust examples for Arm 64-bit both host and TA
-          make -j`nproc`
+          make -j2
 
           # Build project
-          (cd projects/web3/eth_wallet && make -j`nproc`)
+          (cd projects/web3/eth_wallet && make)
       - name: Run tests for Arm 32-bit both host and TA
         run: |
           export ARCH_TA=arm