Only add extra ldflags on linux

Motivation:

We need to ensure we only add the extra ldflags on linux as otherwise compilation will fail on macOS

Modifications:

Add the ldflags on linux only

Result:

Be able to compile on macOS again

boringssl-static/pom.xml

@@ -93,7 +93,7 @@
     <msvcSslLibs>ssl.lib;crypto.lib</msvcSslLibs>
     <cflags>-Werror -fno-omit-frame-pointer -fvisibility=hidden -Wunused -Wno-unused-value -O3</cflags>
     <cppflags>-DHAVE_OPENSSL -I${boringsslSourceDir}/include</cppflags>
-    <ldflags>-L${boringsslHome}/ssl -L${boringsslHome}/crypto -lssl -lcrypto -static-libstdc++ -l:libstdc++.a</ldflags>
+    <ldflags>-L${boringsslHome}/ssl -L${boringsslHome}/crypto -lssl -lcrypto</ldflags>
     <skipJapicmp>true</skipJapicmp>
     <!-- We need to use the same module name for all our "native" impls as only one should be loaded -->
     <javaModuleName>${javaDefaultModuleName}</javaModuleName>
@@ -668,6 +668,17 @@
       </build>
     </profile>
 
+    <profile>
+      <id>linux</id>
+      <activation>
+        <os>
+          <family>linux</family>
+        </os>
+      </activation>
+      <properties>
+        <ldflags>-L${boringsslHome}/ssl -L${boringsslHome}/crypto -lssl -lcrypto -static-libstdc++ -l:libstdc++.a</ldflags>
+      </properties>
+    </profile>
     <profile>
       <id>linux-aarch64</id>