Its economy is 5% the size of Saudi Arabia’s, but analysts are betting the kingdom won’t let its neighbor’s financial woes morph into a Gulf crisis. Bahrain, one of the most vulnerable economies in the Gulf Cooperation Council to political instability and oil-price swings, sought financial support from Saudi Arabia and the United Arab Emirates to replenish its foreign reserves and avert a currency devaluation, according to two people with knowledge of the issue. A third person said Kuwait was also approached.