fix compile on freebsd 4.x

bindings/java/src/jni/javasigar.c

@@ -1269,6 +1269,7 @@ JNIEXPORT jlong SIGAR_JNI(ResourceLimit_INFINITY)
 #ifdef WIN32
     return 0x7fffffff;
 #else
+#include <sys/time.h>
 #include <sys/resource.h>
     return RLIM_INFINITY;
 #endif

src/sigar.c

@@ -1028,6 +1028,10 @@ typedef struct {
 
 #define RLIMIT_PSIZE (RLIM_NLIMITS+3)
 
+#ifndef RLIMIT_AS
+#define RLIMIT_AS RLIMIT_VMEM
+#endif
+
 static rlimit_field_t sigar_rlimits[] = {
     { RLIMIT_CPU,    1,    RlimitOffsets(cpu) },
     { RLIMIT_FSIZE,  1024, RlimitOffsets(file_size) },