- Fix build failure caused by missing 'IsStaticJDK' declaration in awt_LoadLibrary.c.

- Fix erroneous dlsym call in jdk.jdwp.agent/unix/native/libjdwp/linker_md.c.
  Tested the change by running:
  bin/javastatic -agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=0 HelloWorld

Author: jianglizhou

src/java.desktop/unix/native/libawt/awt/awt_LoadLibrary.c

@@ -98,6 +98,9 @@ JNIEXPORT jboolean JNICALL AWTIsHeadless() {
   #define HEADLESS_PATH "/libawt_headless.so"
 #endif
 
+typedef jboolean (*JLI_IsStaticJDK_t)();
+static JLI_IsStaticJDK_t IsStaticJDK = NULL;
+
 jint
 AWT_OnLoad(JavaVM *vm, void *reserved)
 {

src/jdk.jdwp.agent/unix/native/libjdwp/linker_md.c

@@ -129,7 +129,11 @@ void * dbgsysFindLibraryEntry(void *handle, const char *name)
     return dlsym(handle, name);
 }
 
+typedef jboolean (*JLI_IsStaticJDK_t)();
+
 jboolean dbgsysIsStaticJDK()
 {
-    return dlsym(NULL, "IsStaticJDK") != NULL;
+    // JLI_IsStaticJDK is defined by libjli. Check if it is statically linked.
+    JLI_IsStaticJDK_t IsStaticJDK = (JLI_IsStaticJDK_t)dlsym(RTLD_DEFAULT, "JLI_IsStaticJDK");
+    return (IsStaticJDK != NULL) && (IsStaticJDK)();
 }